LONDON -- Kepa Arrizabalaga apologised for refusing to obey Maurizio Sarri's order for him to be substituted for Willy Caballero during extra time of Chelsea's agonising penalty shootout defeat against Manchester City in the Carabao Cup final.

Sarri became enraged on the Wembley touchline when Kepa angrily waved away the attempts of his Chelsea teammates and referee John Moss to get him to leave the field, creating what many perceived to be a moment of public insubordination that undermined his head coach.

Kepa went on to save Leroy Sane's effort in the penalty shootout, but Jorginho and David Luiz missed from 12 yards for Chelsea to hand City victory after a goalless draw over 120 minutes.

Chelsea goalkeeper Kepa Arrizabalaga, seen chatting with teammate David Luiz and the match official, said his argument with club boss Maurizio Sarri was a misunderstanding. Chris Brunskill/Fantasista/Getty Images

"I have to say it was misunderstood," Kepa said. "In no moment was it my intention to disobey, or anything like that with the boss. Just that it was misunderstood, because I had been attended to by the medics twice, and he thought that I wasn't in condition to continue.

"It was two or three minutes of confusion until the medics got to the bench, and they explained everything well. This was nothing to do with the problems I had this week, with [my hamstring]. It wasn't that. And, well, it was misunderstood. Because he thought I couldn't continue, and -- fundamentally -- I was trying to say that physically I was fine.

"I know if you see it from outside, I don't know how it went out, it is not the best image. I have spoken with the boss. I think it was misunderstood. I understand that on television, on social media, they're talking about this, but I am here to explain it, to say that it wasn't my intention to go against the manager.

"We have spoken now, and I was only trying to say I'm fine. He thought I wasn't fine. It was in tense moments, with a lot happening ..."

The goalkeeper also explained his behaviour in a tweet, in English and Spanish.

Kepa's refusal to come off overshadowed an impressive performance from Chelsea against City following their historic 6-0 humiliation against the same opponents at the Etihad Stadium earlier this month, and the Spaniard was keen to switch the focus of discussion to the more encouraging aspects of the game.

"I know the image it's given, but I never intended to refuse to go off," he added. "It was only to say I was fine [to continue].

"I don't think it has to be the major act of this final. I understand we played a good level against one of the best teams in the world. We were close to winning, obviously we're sad that we didn't, and I think the team needs to continue playing like this, because today we've shown we can compete against the best teams. Among the negatives, we have to take the positives."

Meanwhile, former Chelsea boss Jose Mourinho said Kepa left his manager and teammate Willy Caballero in a difficult situation.

"Luckily I have never experienced something like that," Mourinho said in his role as analyst for DAZN Espana.

"I believe the keeper wanted to show his personality, his confidence, and to show 'I am here, I want to go to penalties, I want to make saves and I am here and confident that I will do it' -- that I like."

"But what I did not like was how he left his manager, his assistant and everyone else in such a delicate situation, including his teammate who was ready to come on and in the end he [Caballero] has been left stuck in a mess that is not of his own making. It makes me a little sad because it is a complicated situation."